Public water system · SD4600198
ActiveMclaughlin
At a glance
Mclaughlin (PWSID SD4600198) is an active community water system in Corson County, South Dakota. It reports serving 569 people through 297 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
569
Service connections
297
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Mclaughlin compare with other water systems in Corson County?
By EPA's size categories, Mclaughlin is a small system (501 to 3,300 people). Corson County has 3 active public water systems, and Mclaughlin is the largest of them by population served. Its population served is about 135% above the county average of 242 people per system, and accounts for 78% of the 727 people reported by systems filed under the county. Across South Dakota, the 699 active systems average 1,387 people each. Nationally, the average active community water system reports serving 6,703 people, so Mclaughlin is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. South Dakota has 510 active community water systems, 73% of the state's 699 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 142 South Dakota systems (20%) list purchased surface water as their primary source.
Who owns and regulates Mclaughlin?
EPA lists Mclaughlin as owned by a local government. The SD state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 3 of the 3 active systems in Corson County (100%) are also owned by a local government.
Does Mclaughlin have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2023. The violations listed here began between July 1976 and October 2023. By type: 4 monitoring and reporting. The contaminants or rules involved are Lead and Copper Rule, Nitrate, Gross alpha (excluding radon and uranium) and Combined Radium (-226 and -228). EPA lists 2 as resolved and 2 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2023-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1976-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1976-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Archived |
All 4 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Mclaughlin: frequently asked questions
Who runs Mclaughlin?
Mclaughlin (PWSID SD4600198) is a community water system owned by a local government. It is regulated by the SD state drinking water program.
How many people does Mclaughlin serve?
Mclaughlin reports serving 569 people through 297 service connections in Corson County, South Dakota.
Where does Mclaughlin get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Mclaughlin have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2023. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Mclaughlin's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Mclaughlin's water quality report?
As a community water system, Mclaughlin must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Corson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mcintosh | Corson | 111 | Community | Groundwater |
| Morristown | Corson | 47 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Mclaughlin, PWSID SD4600198, South Dakota”, https://aquacensus.com/water-systems/south-dakota/mclaughlin-sd4600198 (data as of October 1, 2026).